Maybe have her ears checked. Flying can mess with people's ears.

Saying that though, my 8 1/2mth old has been the devils spawn for the best part of 2weeks now. He's never slep well, but is now waking hourly and being awake for hours at a time. I can't put him down and if he's with someone else and sees me he will scream bloody murder until I take him. This is the age they get rather clingy and experience seperation anxiety though, so I can forgive the screaming for me all the time, but the not sleeping is doing my head in. I do think he's teething rather terribly too at the moment though.